Improvement in pipe-tongs



UNITED STATES N JAMES STRATTON, OF NEW HAVEN, CONNECTICUT.

IMPRovi-:MNT IN PIPE-ToNes.

Specification forming part of Letters Patent No.120,910, dated November14, 1871.

To all whom it may concern:

Be it known that I, JAMES STRATTON, of the city and county of New Havenand State of Con` necticut, have invented a new and useful Improvementin Pipe-Tongs, and I do hereby declare that the following is a full,clear, and eX- act description of the same, reference being had to theaccompanying,- drawing forming a part of this specification.

My invention consists in an improvement upon pipe-toi'igs, ashereinafter fully described and subsequently pointed out in the claim.

Figure l is a perspective view of a pair of pipetongs with myimprovement applied thereto. Fig. 2 is a transverse section of the shortjaw, showing the mode of attachment of the disk to the jaw.

A and B represent the griping-levers of the pipetongs, on which myimprovement is made. Instead of the short jaw B having a steel face madefast therein as now practiced by the public, I take a circular plate ordisk, C, (preferably of steel) and attach it to the bottom of jaw B, sothat it cannot escape therefrom or change its relative position to theupper jaw; but, also, so that it can move on its axial center,'and thuscontinually present a varying surface for Wear. In this manner the wholeof the belt of contact surface near the edge will wear down together.The top surface is then simply ground down to a plane face, and this isperformed again and again until the Whole circular plate or disk is Wornout and utilized. In order to attach the disk to the jaw so that it mayrotate therein, I fasten a shank, d, perpendicularly to the centerthereof, make an annular recess in the shank. make acorrespondiugly-perpendicular aperture in the short jaw B, in which thesaid shank is then inserted, and then apply a screw, e, whose pointreaches Within the recess of, but does not press upon, the shank cl.This is my preferable way of enabling the disk to rotate, but docs notconstitute any essential part of my invention.

Having thus described all that is necessary to a full understanding ofmy invention, What I esteem to be new is?- The rotary disk C, applied tothe short jaw of a pair of pipe-tongs, A B, as and for the purposespecified.

Witnesses: JAMES STRATTON.

HENRY E. SMITH, SAML. M. GARDNER. (100)

